Battery charger



FIG. 1 is a perspective view of a battery charger showing our new design;

FIG. 2 is a front elevational view of the battery charger of FIG. 1;

FIG. 3 is a rear elevational view of the battery charger of FIG. 1;

FIG. 4 is a right side elevational view of the battery charger of FIG. 1;

FIG. 5 is a left side elevational view of the battery charger of FIG. 1;

FIG. 6 is a top plan view of the battery charger of FIG. 1; and,

FIG. 7 is a bottom plan view of the battery charger of FIG. 1.

The broken lines shown in the drawings illustrate portions of the battery charger that form no part of the claimed design. 

CLAIM The ornamental design for a battery charger, as shown and described. 